EP1241469B1 - Dispositif résonateur hyperfréquence pour des mesures sur du tabac - Google Patents

Dispositif résonateur hyperfréquence pour des mesures sur du tabac Download PDF

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Publication number
EP1241469B1
EP1241469B1 EP02004050A EP02004050A EP1241469B1 EP 1241469 B1 EP1241469 B1 EP 1241469B1 EP 02004050 A EP02004050 A EP 02004050A EP 02004050 A EP02004050 A EP 02004050A EP 1241469 B1 EP1241469 B1 EP 1241469B1
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EP
European Patent Office
Prior art keywords
resonator
resonator device
field
housing
tobacco
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02004050A
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German (de)
English (en)
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EP1241469A2 (fr
EP1241469A3 (fr
Inventor
Henning MÖLLER
Jörg Tobias
Wolfgang Taute
Reinhard Knöchel
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Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau GmbH
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Publication date
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Priority to EP09000639A priority Critical patent/EP2042858B1/fr
Publication of EP1241469A2 publication Critical patent/EP1241469A2/fr
Publication of EP1241469A3 publication Critical patent/EP1241469A3/fr
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Publication of EP1241469B1 publication Critical patent/EP1241469B1/fr
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • A24C5/3412—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by means of light, radiation or electrostatic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more

Definitions

  • the invention relates to a resonator device for the examination of a quantity of material, wherein the amount of material is a material flow of the tobacco processing industry, for the presence of at least one foreign material and / or for the detection of the mass, density and / or the moisture content of the material, with a resonator, the has a passage opening for the amount of material, wherein the amount of material is at least partially convertible into a test area, wherein at least one of the energy density of electromagnetic waves increasing element is provided, wherein the energy density can be increased in at least part of the test area.
  • a corresponding resonator or a resonator housing for microwaves is from the DE 198 54 550 A1 the applicant known.
  • This document describes a resonator housing interspersed with a strand of the tobacco processing industry, the microwaves are supplied for the purpose of detecting the mass and / or moisture of the strand material.
  • the purpose pursued with this resonator housing is to improve the measuring accuracy and if necessary the measuring sensitivity in the detection of the mass and / or moisture of filler materials of strands of the tobacco-processing industry.
  • This is gem. of the DE 198 54 550 A1 achieved in that the housing is at least partially made of a material having a low expansion coefficient, so that with a corresponding temperature variation, the housing retains a substantially same size.
  • the applicant is also aware of a method of testing a production material that contains mainly a production material, wherein the presence of a foreign material in this amount is checked, and wherein a microwave field is generated, the amount of material introduced into the effective range of the microwave field and the Influence of the microwave field is analyzed, wherein the actual values of a first and a second characteristic size of the microwave field are measured simultaneously, wherein an allowable range of values for these actual values is given, and wherein it is checked whether the actual values in the allowable value range and a signal is generated if the actual values are not within the permissible value range.
  • both real magnitudes of the generated microwave field such as amplitude and phase
  • magnitudes of a component leading the microwave field such as the resonant frequency and the bandwidth of a resonator in which the microwave field propagates.
  • the material to be measured is moved through the field of a resonator.
  • the dielectric properties of the material to be measured change the field.
  • a determination of e.g. Mass, density and humidity and the detection of foreign bodies It is difficult to detect very small foreign bodies or to achieve a relatively accurate spatial resolution.
  • the position of the foreign body in relation to the field shape determines the detection accuracy.
  • EP 0 468 057 A1 discloses a cavity resonator, by means of which in an elongated material which moves through the electric field of the resonator, small pieces of metal are detectable via electrical discharges.
  • US 5,389,883 A relates to a cavity resonator with a helical coil for measuring the relative proportions of oil, water and gas in a tube.
  • Several resonators are used with coils wound around the tube, each tuned to different resonant frequencies or arranged differently from the tube.
  • the housing of a microwave resonator device for measuring the physical properties of a material has a centered projection, so that the electric field in the resonator device is constricted at this point is used to measure the corresponding properties of the material.
  • a resonant frequency is set.
  • EP 0 511 651 A1 relates to a liquid monitor wherein the liquid in a pipe segment is part of a dielectric loading of a microwave resonator.
  • the housing of the resonator has a constriction in the form of a focusing rod, so that the field lines are bundled at the location of the tube segment.
  • US 5 049 812 relates to the use of an open ring resonator designed as a stripline or microstrip line for the characterization of samples.
  • the object of the present invention is to specify a resonator device by means of which the sensitivity of a method for determining whether a foreign material is contained in a material flow and / or for detecting the mass, density and / or the humidity of the material flow or the amount of material is increased ,
  • a further object of the present invention is to provide means with which the accuracy and spatial resolution of corresponding measurements are improved.
  • a resonator device for testing a quantity of material, wherein the amount of material is a material flow of the tobacco-processing industry, for the presence of at least one foreign material and / or for the detection of the mass, density and / or the moisture content of the material, with a resonator , which has a passage opening for the amount of material, wherein the amount of material at least partially in a test area is transferable, wherein at least one of the energy density of electromagnetic waves increasing element is provided, the energy density can be increased in at least a portion of the test area, which is further developed in that the element comprises a line resonator with at least one electrode acting as an end face the line resonator is a metal strip having two end faces aligned towards the test area, the line resonator being an open ring.
  • the energy density of electromagnetic waves means to increase or increase, in particular, that these waves are focused, focused, narrowed or compressed.
  • the electromagnetic waves are preferably microwaves.
  • the resonator device is preferably a microwave resonator device.
  • a material flow can be tested by the resonator device according to the invention.
  • the term test area also includes in particular the term measuring range.
  • the test area is arranged in the resonator device.
  • a coupling-in antenna and a coupling-out antenna are provided, which are preferably arranged symmetrically in the resonator device. Furthermore, the antennas are preferably arranged in the vicinity of a location of the line resonator at which the coupling-imparting field component has a high amplitude, preferably a maximum.
  • a particularly good coupling of the waves coupled to the element and waves coupled out from the element is given since the element is arranged in a cavity of the resonator device at a distance from the walls delimiting the cavity.
  • the at least one end surface is located near the flow of material or test area.
  • the size of the end face is smaller than the area of the material stream located in the resonator means is located in a test area, taking into account a cross-sectional area that is substantially parallel to the end face.
  • the material flow is, for example, in the case of a material flow of the tobacco-processing industry, a tobacco stream, which is preferably enveloped with a wrapping material, such as paper, ie a cigarette rod whose diameter is usually in the range of about 6 to about 10 mm.
  • the size of the end face which may, for example, be substantially rectangular, is preferably smaller than 1/10 of the area of the material stream to be projected onto a wall of the resonator device.
  • an area ratio as in Fig. 2 is shown, wherein the in Fig. 2 represented cross-sectional area of the cigarette rod in the cavity 7 is meant as relevant surface.
  • the line resonator is a thin cuboid made of metal, which has an end face in the direction of the test area. If preferably at least one inner wall of the resonator housing serves as an electrode, in particular as a counter electrode to the end face, the electromagnetic wave field can be established between the end face of the metal strip and this inner wall, so that a defined, narrow measuring range is provided.
  • the two end surfaces are substantially parallel to each other, whereby the homogeneity of the wave field is further increased.
  • the one element consists at least partially of a material with a low expansion coefficient, in particular with respect to the temperature, very reliable and accurate measurements are possible.
  • the metal strip is coated with a corrosion resistant material, especially gold is, a corresponding longevity of the resonator is given.
  • a measuring device for the examination of a quantity of material, in particular a material flow of the tobacco processing industry, for the presence of at least one foreign material and / or for the detection of the mass, density and / or the moisture content of the material, with at least one resonator, the at least has an opening for the amount of material and in which an electromagnetic field can be generated, characterized in that the measuring device comprises at least two resonator housing, each defining a measuring range, wherein the electromagnetic fields each comprise an electric field in the respective measuring ranges in are oriented to each other different directions in space.
  • the electromagnetic field is preferably a microwave field, which comprises a standing microwave field in the resonator housing.
  • the mutually different directions of the electric fields according to the invention allow the more accurate determination of foreign bodies, since foreign bodies, which are not detected by means of a resonator, then can be detected with great probability by means of the other resonator. This is especially to think of foreign bodies, which have a geometric shape that is greater in one direction than in another direction.
  • the mutually different directions in the space of the fields mean in particular that these fields are pronounced at different angles to the conveying direction.
  • the measuring ranges are in the conveying direction of the material flow one behind the other, so that a separate evaluation of the corresponding Measurements of the amount of material in the measuring ranges can be made and so that an influence of the respective measuring ranges by the adjacent measuring range does not take place.
  • the electric fields may be oriented substantially orthogonal to one another.
  • orthogonal means in particular perpendicular to each other.
  • field means in particular electric field.
  • the third resonator housing is preferably designed such that the electric field is substantially orthogonal to those of the other two resonator housing.
  • the measuring device comprises a resonator device according to the invention or preferably designed as described above.
  • a compact measuring device is given when a single housing comprises at least two resonator.
  • a corresponding measuring system for checking a material flow of the tobacco-processing industry, for the presence of at least one foreign material and / or for the detection of the mass, density and / or moisture, of at least one region of the material flow is designed such that at least two Measuring devices are provided by means of which the flow of material in mutually different directions in space can be measured.
  • the direction of the measurement is to be understood as the direction of the field which is decisive for the measurement, in particular of the electric field.
  • at least one measuring device is designed such that a measurement in the conveying direction of the material flow is made possible. To this is, for example, on the DE 198 54 550 A1 refer, in the example.
  • a corresponding measuring device is shown, by means of which a measurement in the conveying direction of the material flow is made possible. If at least one measuring device is designed such that a measurement is made possible transversely to the conveying direction of the material flow, for example, one of the resonator devices according to the invention, as described above, can be used.
  • the measuring devices may be provided three measuring devices, wherein the measuring devices are configured such that the material flow in three mutually different directions, in particular in substantially orthogonal directions, in space is measurable.
  • the measuring device which allows a measurement transverse to the conveying direction, one of the resonator devices according to the invention, which are described above.
  • a corresponding method for testing a quantity of material, in particular a material stream of the tobacco-processing industry, for the presence of at least one foreign material and / or for detecting the mass, density and / or moisture of the amount of material is designed so that a first electromagnetic field is generated in a first resonator and a second electromagnetic field is generated in a second resonator, the amount of material the first and second fields are moved through and a change in at least one property of the electromagnetic fields is measured.
  • a property of the electromagnetic fields may be, for example, the field strength, the frequency or the phase. Furthermore, in the case of a standing wave field, for example in the case of a resonator, a property of an electromagnetic field may be the position of the bellies or nodes or the resonance frequency as well as the amplitude.
  • the electric fields can be oriented in mutually different directions. It can be assumed that both the E field and the H field are oriented in mutually different directions.
  • a third resonator which generates a third electromagnetic field, the amount of material being moved through the third field, wherein the third field is oriented in different direction to the first field and the second field and the change of at least one property of the third field is measured, an even more accurate analysis of the material flow from foreign bodies or an even more accurate detection of the density, humidity and mass of the material flow can be made possible.
  • the electric fields may be substantially orthogonal to one another in the respective resonators.
  • the measured values are evaluated in order to generate an ejection signal, it is possible, for example, to separate out sections of the material stream from the further processing. This avoids that, for example, in cigarette production poorly filled cigarettes or too dry cigarettes or cigarettes are made with a foreign material.
  • the measured values of the resonators are related, a very accurate spatial resolution is possible. By means of such a precise spatial resolution, the rejects of conveyed material must be kept as low as possible. The coupling of the measurement results of the different resonators thus increases the accuracy or the spatial resolution of the measurements.
  • Fig. 1 shows a cross section through a resonator 4.1 in a plan view, these along the arrows B at the section BB of Fig. 2 is to be considered.
  • FIG Fig. 1 shows A hollow cylinder 6 made of metal, which is preferably provided with a gold layer 12 at least from the inside, delimits the resonator housing 4.1.
  • a post 19 is shown, which is also covered with a gold layer 12. Both the hollow cylinder 6 and the post 19 are shown in cross section.
  • a line resonator 21 is shown in the interior 7 or cavity 7, which is an open ring and has two end faces 20.
  • a passage bore 10 for the passage of a cigarette rod 1 is shown.
  • Fig. 2 the cigarette rod 1 is shown, which is partially broken and moves in the direction of the arrow 5.
  • the cigarette rod 1 consists of a filler 3 made of cut tobacco and a wrapper 2 made of cigarette paper.
  • the cigarette rod 1 passes through a resonator housing 4.1, the microwaves for the purpose of detecting the mass, density and / or moisture of the filler or for the purpose of determining whether a foreign material is present in the filler supplied.
  • the resonator 4.1 has a hollow body in the form of a hollow cylinder 6, the interior 7 is arranged symmetrically to the post 19. On the hollow cylinder, a lid 8 is screwed to close. Both hollow cylinder 6 and cover 8 are made of a material with a very low temperature expansion coefficient.
  • Fig. 2 indicated regulation of the temperature of the resonator housing, whose temperature is detected by a temperature sensor 9.
  • the temperature sensor controls at least one heating transistor 11, for example of the type BUZ 80 from the company Siemens, whose heat loss preferably heats the resonator housing above ambient temperature.
  • the control device itself is not in the Fig. 2 however, it is known to a person skilled in the art.
  • the resonator 4.1 is also gold plated from the outside to exclude corrosion outside.
  • a protective tube 13 which advantageously consists of a substance of polyaryletherketone (PAEK) group , For example, consists of polyetheretherketone (PEEK).
  • PAEK polyaryletherketone
  • PEEK polyetheretherketone
  • the resonator housing 4.1 extends outwardly of the inner space 7 tubular (14) on both sides in the direction of the strand 1 to the outside to prevent the escape of microwaves from the resonator. It may also extend slightly tubular inward, which, however, in Fig. 2 not shown.
  • the microwaves generated by a microwave generator serves a insulated by an insulation 16 from the metal housing 4.1 coupling antenna 17.
  • an insulation 16 For coupling out of microwaves, which are to be supplied to an evaluation circuit, not shown, is used by an insulation 16 relative to the lid 8 isolated Auskoppelantenne 18.
  • Die Antennas 17 and 18 can also be arranged on the same side of the housing. Preferably, these are then arranged offset in the circumferential direction.
  • a suitable evaluation circuit is shown in German Patent Application 197 34 978.1.
  • the line resonator 21 is arranged close to the coupling antennas 17 and 18.
  • the standing wave in the line resonator excites an electromagnetic wave in the outcoupling antenna 18, which derives the energy from the resonator.
  • a capacitive coupling has been described. It is also possible within the scope of the invention to provide an inductive coupling.
  • Fig. 3 is a variant not according to the invention shown, wherein in contrast to the previous embodiment of the invention gem.
  • Figures 1 and 2 a hollow cuboid 22 acts as a resonator housing 4.2 and further a line resonator 21, which is a metal strip.
  • Fig. 3 is a sectional view of the section line DD Fig. 4 , this section being viewed in the direction of the arrow.
  • Fig. 4 is a side view of a sectional view taken along the section line CC Fig. 3 ,
  • the other features, such as the protective tube 13, the gold layer 12, the cigarette rod 1, etc. are not shown in these figures in order to make the elements shown more clearly.
  • the field which emerges from the line resonator 21 or from the end face 20 or field exit face 20 has, as counterelectrode, the opposite housing wall, which acts there as a ground electrode.
  • 101 00 664.0 is used to study the large quantities of tobacco automatically processed in the tobacco processing industry, in particular foreign materials that may be present in the cigarettes, these foreign materials having an effect on product properties such as appearance To be able to taste and smoke.
  • a microwave field is generated, the amount of material is introduced into the effective range of the microwave field and the influence of the microwave field is analyzed, wherein the actual values of a first and a second characteristic size of the microwave field are measured simultaneously, a permissible value range for these actual values is specified, and it is checked whether the actual values are within the permissible value range. A signal is then generated if the actual values are not within the permissible value range.
  • the permissible value range preferably comprises in this method those values of the two quantities which occur when the microwave field is influenced by a quantity of material, in particular a cigarette rod, which contains exclusively the production material.
  • the material flow is preferably subdivided into sections before or after passage through the active region of the microwave field, and those sections whose passage produces the signal are subsequently separated from the material flow.
  • the allowable value range can be determined by passing a reference amount of the production material containing small foreign matters through the effective range of the microwave field and forming the actual values measured during the passage of the reference amount, the allowable value range.
  • the reference quantity may advantageously be enveloped by a shell material.
  • This method can preferably be carried out with a further method in which at least one property of the production material can be determined in parallel and independently from the actual values of the same characteristic variables of the microwave field.
  • This property may in particular be the density, the mass and / or the humidity of tobacco used as a production material.
  • Suitable foreign materials are, in particular, metals and plastics, which physically cause a completely different change in the microwave field than the water-containing tobacco material.
  • the high conductivity of the metals for example, causes the microwaves to be strongly reflected or scattered.
  • Plastics have significantly different dielectric constants and loss factors than tobacco, so that they can also be easily detected.
  • different frequencies are supplied to the resonator, wherein the transmission power is determined at these frequencies and from these data, the two sizes or a plurality of characteristic variables are determined by a mathematical method.
  • resonance curves are preferably used and corresponding value pairs are determined, which are measured due to the slight detuning about a center frequency.
  • FIGS. 3 and 4 used materials and coatings may be those according to the embodiment.
  • Fig. 5 schematically a corresponding measuring device with three resonator 4.3 - 4.5 is shown.
  • a cigarette rod 1 which is filled with a filler 3.
  • a wrapping paper strip 2 is arranged.
  • the resonator housing 4.3 - 4.5 have cavities, which are not shown. In the cavities electromagnetic fields are generated, which have differently oriented electric field lines 23. So run field lines 23 of the right in Fig. 5 arranged resonator 4.5 in the conveying direction 5.
  • the field lines 13 extend transversely to the conveying direction 5 in the plane of the drawing and in the left resonator 4.3, the field lines 23 extend transversely to the conveying direction 5 and out of the plane of the drawing.
  • each additional direction brings further measurement information.
  • both in the direction of movement as well as perpendicular to it is possible to detect many foreign bodies, which would not be detected, for example, in a measurement exclusively in one direction.
  • the measurement signals can then be evaluated separately, so that an ejection occurs when at least one of the sensors or measuring devices detects a foreign body.
  • the measurement signals can also be linked together in order to improve the spatial resolution or to increase the overall sensitivity of the system.
  • the temporal offset of the measurements results from the distance of the resonator housing the production speed or the conveying speed of the material to be tested and is thus easy to compensate mathematically.

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  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Toxicology (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
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  • Professional, Industrial, Or Sporting Protective Garments (AREA)

Claims (7)

  1. Dispositif résonateur pour l'analyse d'une quantité de matière, ladite quantité de matière étant un courant de matière (3) de l'industrie de transformation du tabac, l'analyse portant sur la présence d'au moins une matière étrangère et/ou sur la détection de la masse, de la masse volumique et/ou de l'humidité de la quantité de matière (3), comportant un boîtier de résonateur (4.1 - 4.5), qui comprend une ouverture de passage (10) pour la quantité de matière (3), la quantité de matière pouvant au moins partiellement être transférée dans une zone de test, au moins un élément (21) augmentant la densité d'énergie d'ondes électromagnétiques étant prévu dans la cavité formée par la paroi intérieure du boîtier du résonateur et délimitant le champ électromagnétique, la densité d'énergie pouvant être augmentée dans au moins une partie de la zone de test, l'élément (21) comportant un résonateur à lignes (21) comportant au moins une surface terminale (20) jouant le rôle d'électrode, le résonateur à lignes (21) étant une bande métallique, qui comprend deux surfaces terminales (20) dirigées dans la direction de la zone de test (3), le résonateur à lignes étant un anneau ouvert.
  2. Dispositif résonateur selon la revendication 1, caractérisé en ce qu'une antenne d'entrée (17) et une antenne de sortie (18) sont prévues.
  3. Dispositif résonateur selon l'une des revendications 1 à 2, caractérisé en ce que l'aire de la surface terminale (20) est inférieure à l'aire de la section transversale de la zone de test, la section transversale étant pour l'essentiel parallèle à la surface terminale.
  4. Dispositif résonateur selon l'une des revendications 1 à 3, caractérisé en ce que les deux surfaces terminales (20) sont pour l'essentiel parallèles l'une à l'autre.
  5. Dispositif résonateur selon l'une des revendications 1 à 4, caractérisé en ce que la bande métallique présente un faible coefficient de dilatation.
  6. Dispositif résonateur selon l'une des revendications 1 à 5, caractérisé en ce que la bande métallique est revêtue d'un matériau (12) résistant à la corrosion, en particulier l'or.
  7. Dispositif résonateur selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif résonateur est un dispositif résonateur à micro-ondes.
EP02004050A 2001-03-15 2002-02-23 Dispositif résonateur hyperfréquence pour des mesures sur du tabac Expired - Lifetime EP1241469B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09000639A EP2042858B1 (fr) 2001-03-15 2002-02-23 Dispositif résonateur à microondes de mesure

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10112499A DE10112499B4 (de) 2001-03-15 2001-03-15 Resonatoreinrichtung, insbesondere Mikrowellenresonatoreinrichtung
DE10112499 2001-03-15
DE10157266 2001-11-22
DE10157266A DE10157266A1 (de) 2001-03-15 2001-11-22 Resonatoreinrichtung, insbesondere Mikrowellenresonatoreinrichtung und Messeinrichtung

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP09000639A Division EP2042858B1 (fr) 2001-03-15 2002-02-23 Dispositif résonateur à microondes de mesure

Publications (3)

Publication Number Publication Date
EP1241469A2 EP1241469A2 (fr) 2002-09-18
EP1241469A3 EP1241469A3 (fr) 2004-04-14
EP1241469B1 true EP1241469B1 (fr) 2009-07-29

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EP02004050A Expired - Lifetime EP1241469B1 (fr) 2001-03-15 2002-02-23 Dispositif résonateur hyperfréquence pour des mesures sur du tabac
EP09000639A Expired - Lifetime EP2042858B1 (fr) 2001-03-15 2002-02-23 Dispositif résonateur à microondes de mesure

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EP09000639A Expired - Lifetime EP2042858B1 (fr) 2001-03-15 2002-02-23 Dispositif résonateur à microondes de mesure

Country Status (7)

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US (2) US6747460B2 (fr)
EP (2) EP1241469B1 (fr)
JP (2) JP4065700B2 (fr)
CN (2) CN100480691C (fr)
AT (2) ATE482390T1 (fr)
DE (4) DE10112499B4 (fr)
PL (1) PL205877B1 (fr)

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DE202005001756U1 (de) * 2004-02-12 2005-05-04 Trützschler GmbH & Co KG Mikrowellensensor zur Messung einer dielektrischen Eigenschaft eines Produkts
DE102004017597B4 (de) * 2004-04-07 2006-06-22 Hauni Maschinenbau Ag Resonatorgehäuse für Mikrowellen
CN100359321C (zh) * 2004-06-14 2008-01-02 上海恒尚自动化设备有限公司 利用微波进行物质的质量和水分检测的方法
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JP2006349425A (ja) * 2005-06-14 2006-12-28 Oji Paper Co Ltd 坪量測定方法及び装置
ITBO20050602A1 (it) * 2005-10-07 2007-04-08 Gd Spa Macchina impacchettatrice,metodo e dispositivo per il controllo di punte di sigarette
KR100776679B1 (ko) * 2006-09-27 2007-11-16 한국전자통신연구원 챔버의 비운용 주파수 대역에서의 안테나 특성 측정 방법
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EP2042858A3 (fr) 2009-09-02
ATE482390T1 (de) 2010-10-15
DE50214682D1 (de) 2010-11-04
EP1241469A2 (fr) 2002-09-18
EP2042858A2 (fr) 2009-04-01
JP2002340817A (ja) 2002-11-27
DE10157266A1 (de) 2003-06-05
JP2007212476A (ja) 2007-08-23
CN1869669A (zh) 2006-11-29
DE10112499A1 (de) 2002-09-26
JP4065700B2 (ja) 2008-03-26
DE50213714D1 (de) 2009-09-10
US20020130670A1 (en) 2002-09-19
CN1375694A (zh) 2002-10-23
CN100480691C (zh) 2009-04-22
EP2042858B1 (fr) 2010-09-22
DE10112499B4 (de) 2010-08-19
CN1265191C (zh) 2006-07-19
US6747460B2 (en) 2004-06-08
PL205877B1 (pl) 2010-06-30
US6917205B2 (en) 2005-07-12
US20040124853A1 (en) 2004-07-01
EP1241469A3 (fr) 2004-04-14
ATE438094T1 (de) 2009-08-15
PL352769A1 (en) 2002-09-23

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